Between brackets is the number of accepted species
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- Biota
- Kingdom Animalia
- Kingdom Archaea
- Kingdom Bacteria
- Kingdom Chromista
- Kingdom Fungi
- Kingdom Plantae
- Phylum Acritarcha †
- Phylum Algae (awaiting allocation)
- Phylum Algae incertae sedis
- Phylum Anthocerotophyta
- Phylum Bryophyta
- Phylum Calcitarcha †
- Phylum Charophyta
- Phylum Chlorophyta
- Phylum Eophyta †
- Phylum Glaucophyta
- Phylum Gymnospermophyta accepted as Tracheophyta
- Phylum Horneophyta †
- Phylum Magnoliophyta accepted as Tracheophyta
- Phylum Marchantiophyta
- Phylum Picozoa
- Phylum Plantae (awaiting allocation)
- Phylum Prasinodermatophyta
- Phylum Pteridophyta accepted as Tracheophyta
- Phylum Rhodelphidia
- Phylum Rhodophyta
- Phylum Sporae dispersae †
- Phylum Tracheophyta
- Subdivision Lycopodiophytina
- Subdivision Polypodiophytina
- Class Cladoxylopsida † accepted as Polypodiopsida
- Class Equisetopsida accepted as Polypodiopsida
- Class Filicopsida accepted as Polypodiopsida
- Class Polypodiopsida
- Subclass Equisetidae
- Subclass Marattiidae
- Subclass Ophioglossidae
- Subclass Polypodiidae
- Order Cyatheales
- Order Filicales accepted as Polypodiales
- Order Gleicheniales
- Order Hydropteridales † accepted as Salviniales
- Order Hymenophyllales
- Order Marsileales accepted as Salviniales
- Order Osmundales
- Order Palaeophyllales †
- Order Polypodiales
- Order Polypodiidae (awaiting allocation)
- Family Polypodiidae (awaiting allocation)
- Genus Acrangiophyllum Mamay, 1955 †
- Genus Acrocarpus Schenk, 1867 †
- Genus Actinostelopteris B.D. Sharma & D.R. Bohra, 1976 †
- Genus Aculea J.G. Douglas, 1973 †
- Genus Adiantophyllum M. Langeron, 1899 †
- Genus Agasopteris Zalessky, 1937 †
- Genus Alamatus J.G. Douglas, 1973 †
- Genus Alsophilina Dormitzer in Krejcí, 1853 †
- Genus Amanda J.G. Douglas, 1973 †
- Genus Amdrupiopsis H.C. Sze & H.H. Lee, 1952 †
- Genus Anastomopteris R.H. Wagner, 1958 †
- Genus Andriania C.F.W. Braun in Münster, 1843 †
- Species Andriania baruthina Braun †
- Genus Angariella V.A. Chachlov, 1939 †
- Genus Anomalofilicites Hollick, 1916 †
- Genus Aphlebia K.B. Presl in Sternberg, 1838 †
- Genus Aphlebiocarpus Stur, 1877 †
- Genus Aphlebiopteris Gothan & Zimmermann, 1932 †
- Genus Aspidites Göppert, 1836 †
- Genus Asplenites H.R. Göppert, 1836 †
- Genus Aulacopteris Grand'Eury, 1877 †
- Genus Baqueroties R. Herbst, 1967 †
- Genus Bardia M.D. Zalessky, 1933 †
- Genus Barsasopteris S.A. Stepanov, 1967 †
- Genus Beinertia Göppert, 1836 †
- Genus Biarmella Zalessky, 1939 †
- Genus Blechnoxylon Etheridge, 1899 †
- Genus Bockschia Göppert, 1836 †
- Genus Boiophyton J. Obrhel, 1959 †
- Genus Bonaventurea Debey & Ettingshausen, 1859 †
- Genus Borovuchkia M.D. Parfenova, 1965 †
- Genus Boweria Kidston, 1911 †
- Genus Callipteridium C.E. Weiss, 1870 †
- Genus Carolopteris Debey & Ettingshausen, 1859 †
- Genus Chansitheca Regè, 1921 †
- Genus Cheilanthites H.R. Göppert, 1836 †
- Genus Cheiloleptites G. Saporta in O. Heer, 1861 †
- Genus Chelepteris Corda, 1845 †
- Genus Chrysodiopteris G. Saporta, 1891 †
- Genus Copiapaea H. Graf zu Solms-Laubach in G. Steinmann, 1899 †
- Genus Cryptogrammites G. Andreánszky, 1951 †
- Genus Crystogrammites G. Andreánszky, 1951 †
- Genus Crytogrammites G. Andreánszky, 1951 †
- Genus Cuyenopteris E.I. Vera, 2010 †
- Genus Cymoglossa W.P. Schimper, 1869 †
- Genus Cyphopteris K.B. Presl in Sternberg, 1838 †
- Genus Dactylopteris Göppert, 1852 †
- Genus Dalejophyton J. Obrhel, 1957 †
- Genus Davallites J.W. Dawson, 1883 †
- Genus Delgadoa O. Heer, 1881 †
- Genus Dendraena Nemejc, 1934 †
- Genus Dichoneuron G. Saporta, 1878 †
- Genus Dichopteris Zigno, 1864 †
- Genus Dicropteris Pomel, 1849 †
- Genus Dictyodendron A.G. Nathorst, 1914 †
- Genus Dictyodendron Landsborough in Patrick, 1844 †
- Genus Dictyostelopteris Vishnu-Mittre, 1959 †
- Genus Diplasterotheca Hirmer, 1927 †
- Genus Diplazites H.R. Göppert, 1836 †
- Genus Diplodictyum C.F.W. Braun in Münster, 1843 †
- Genus Diplophacelus Corda, 1845 †
- Genus Diplotheca R. Kidston, 1903 †
- Genus Dipteriphyllum F. Krasser, 1896 †
- Genus Distichotheca L.H. Dong, X.X. Li, Z.Y. Zhou, R. Xu & J.N. Zhu, 1974 †
- Genus Doleropteris Grand'Eury, 1877 †
- Genus Dyotheca W. Hartung, 1938 †
- Genus Echinosporangites J. Pšenička & J. Bek, 2009 †
- Genus Enigmophyton O.A. Høeg, 1942 †
- Genus Feronia A. Carpentier, 1927 †
- Genus Filicosorus O.P. Suthar, D.R. Bohra & B.D. Sharma, 1995 †
- Genus Flicheia F. Pelourde, 1908 †
- Genus Fortisia Visiani, 1858 †
- Genus Fortopteris M. Boersma, 1969 †
- Genus Fremouwa M.A. Millay & T.N. Taylor, 1990 †
- Genus Fremouwia M.A. Millay & T.N. Taylor, 1990 †
- Genus Gellera Hollick, 1931 †
- Genus Glossochlamys Ettingshausen & Gardner in Gardner & Ettingshausen, 1879 †
- Genus Goeppertia K.B. Presl in Sternberg, 1838 †
- Genus Goniopterites A.T. Brongniart in A.C.V.D. d'Orbigny, 1849 †
- Genus Gordonopteris J.H.A. van Konijnenburg-van Cittert, E. Kustatscher & M. Wachtler, 2006 †
- Genus Guptiorachis B.D. Sharma, 1971 †
- Genus Gyropteris A.J. Corda, 1845 †
- Genus Hapalopteris D.R.J. Stur, 1883 †
- Genus Haplotheca W. Gothan & W. Hartung ex W. Gothan, 1949 †
- Genus Hawlea Corda, 1845 †
- Genus Heterofilicites E.W. Berry, 1905 †
- Genus Hissaropteris Y.M. Kuzichkina & T.A. Sixtel in T.A. Sixtel, 1960 †
- Genus Hymenophyllea C.E. Weiss, 1869 †
- Genus Hyphopteris W.P. Schimper, 1869 †
- Genus Jacutopteris N.D. Vasilevskaja, 1960 †
- Genus Kaloxylon Williamson, 1875 †
- Genus Kenderlykia A.I. Turutanova-Ketova, 1962 †
- Genus Kirchneria C.F.W. Braun, 1854 †
- Genus Kryshtofovichia P.A. Nikitin, 1934 †
- Genus Laskovskia Zalessky, 1939 †
- Genus Lenlogia V.A. Krassilov & T.V. Zakharova, 1995 †
- Genus Lescuropteris W.P. Schimper, 1869 †
- Genus Liknopetalon S.J. Smithies in J.M. Anderson & H.M. Anderson, 1985 †
- Genus Lontzenia Stockmans & Willière, 1952 †
- Genus Loxopteris Pomel, 1846 †
- Genus Manebachia R. Remy & W. Remy, 1958 †
- Genus Maokheopteris I.N. Srebrodol'skaja, 1969 †
- Genus Marattites Marion & Laurent, 1898 †
- Genus Marginopteris W. Gothan, 1941 †
- Genus Marzaria A. de Zigno, 1867 †
- Genus Matonidium Schenk, 1871 †
- Genus Medwellia N.S. Nagalingum & S. McLoughlin in S. McLoughlin, A.-M. Tosolini, N. Nagalingum & A. Drinnan, 2002 †
- Genus Merianopteris O. Heer, 1877 †
- Genus Mertensides W.M. Fontaine, 1883 †
- Genus Mesocrossotheca S.V. Naugolnykh & N.K. Mogutcheva in N.K. Mogutcheva & S.V. Naugolnykh, 2001 †
- Genus Mesoneuraster F. Sandberger, 1867 †
- Genus Microdictyon Saporta, 1872 †
- Genus Mittagia O. Lignier, 1913 †
- Genus Mokrawia G. Knopp, 1933 †
- Genus Monheimia Debey & Ettingshausen, 1859 †
- Genus Monocarpia W.J. Jongmans & W. Gothan, 1935 †
- Genus Nathorstia O. Heer, 1880 †
- Genus Nephropteris A.T. Brongniart in A.C.V.D. d'Orbigny, 1849 †
- Genus Neriopteris Newberry, 1873 †
- Genus Noeopteris Janssen, 1940 †
- Genus Ochotopteris E.L. Lebedev, 1974 †
- Genus Oligosporangiopteris J. Votočková Frojdová, J. Wang, J. Pšenička, J. Bek, S. Opluštil & M. Libertín, 2021 †
- Genus Osmundophyllum Velenovský, 1889 †
- Genus Otidophyton D. White in G.O. Smith & D. White, 1905 †
- Genus Ovopteridium F. Behrend, 1909 †
- Genus Padgettia S.H. Mamay, 1962 †
- Genus Palmatopteris H. Potonié, 1893 †
- Genus Parapecopteris Grand'Eury, 1890 †
- Genus Peremopteris Zalessky, 1937 †
- Genus Phialopteris K.B. Presl in Sternberg, 1838 †
- Genus Phillipopteris J.J. Hamer & G.W. Rothwell, 1983 †
- Genus Phlebomeris G. Saporta, 1893 †
- Genus Plumatopteris Kidston, 1894 †
- Genus Polytheca H. Potonié in Engler & Prantl, 1900 †
- Genus Protopteridophyton C.-S. Li & J. Hsü, 1987 †
- Genus Psammopteris C.E.I. von Eichwald, 1862 †
- Genus Pseudomariopteris P. Danzé-Corsin, 1953 †
- Genus Pteridites Tuzson, 1913 †
- Genus Pteridoleimma Debey & Ettingshausen, 1859 †
- Genus Pteridorachis Nathorst, 1902 †
- Genus Pteridotheca D.H. Scott, 1907 †
- Genus Pterisorus G.W. Rothwell & R.A. Stockey, 2006 †
- Genus Pterygopteris Johansson, 1922 †
- Genus Ptilorhachis Corda, 1845 †
- Genus Rachiopteris W.C. Williamson ex A.C. Seward, 1894 †
- Genus Raphaelia Debey & Ettingshausen, 1859 †
- Genus Resilitheca D. Edwards, U. Fanning, K.L. Davies, L. Axe & J.B. Richardson, 1995 †
- Genus Rhizomopsis W. Gothan & H.C. Sze, 1933 †
- Genus Rhodea K.B. Presl in Sternberg, 1838 †
- Genus Ricciopsis G.P. Radczenko, 1956 †
- Genus Rienitsia A.B. Walkom, 1932 †
- Genus Saarotheca W. Remy, 1953 †
- Genus Sacheria Ettingshausen, 1852 †
- Genus Santhalea P.K. Maithy, 1977 †
- Genus Sarcopteris B. Renault, 1883 †
- Genus Saropteris E.F. Tschirkova, 1937 †
- Genus Scaphidopteris B. Renault, 1883 †
- Genus Schizopteris A.T. Brongniart, 1828 †
- Genus Schleporia M.A. Millay & T.N. Taylor, 1990 †
- Genus Schopfiopteris M.A. Millay & T.N. Taylor, 1990 †
- Genus Sciadipteris Sternberg ex K.B. Presl in Sternberg, 1838 †
- Genus Semigleicheniidites Nagy, 1968 †
- Genus Shirakia S. Kawasaki, 1934 †
- Genus Solenostelopteris Kershaw, 1910 †
- Genus Sorotheca D.R.J. Stur, 1883 †
- Genus Spathepteris K.B. Presl, 1846
- Genus Sphalmopteris Corda, 1845 †
- Genus Sphegopteris Zalessky, 1939 †
- Genus Sphyropteris D.R.J. Stur, 1883 †
- Genus Staphylopteris K.B. Presl in Sternberg, 1838 †
- Genus Steffensia Göppert, 1836 †
- Genus Stephanida F.J.A.N. Unger in R. Richter & F.J.A.N. Unger, 1856 †
- Genus Stephanofilix Post & O. Kuntze, 1903 †
- Genus Stichopteris H.B. Geinitz, 1858 †
- Genus Stockmansia B. Bohlin, 1976 †
- Genus Straelenipteris Stockmans, 1936 †
- Genus Stramineopteris S.A. Little, R.A. Stockey & G.W. Rothwell, 2006 †
- Genus Strigillotheca L.H. Dong, X.X. Li, Z.Y. Zhou, R. Xu & J.N. Zhu, 1974 †
- Genus Sturia Němejc, 1934 †
- Genus Surangea S.D. Chitaley & M.T. Sheikh, 1972 †
- Genus Sylvia Zalessky, 1937 †
- Genus Sylvopteris Zalessky, 1937 †
- Genus Taenitites P.H. Fritel, 1909 †
- Genus Teilhardia Seward, 1913 †
- Genus Tetrameridium W. Gothan, 1913 †
- Genus Tetraptilon Frenguelli, 1950 †
- Genus Tetratmema P. Corsin, 1951 †
- Genus Thainguyenopteris I.N. Srebrodol'skaja, 1969 †
- Genus Tinpaharia K. Jacob in B. Sahni & R.V. Sitholey, 1943 †
- Genus Tomiella V.A. Chachlov, 1939 †
- Genus Tumniella A.G. Lebedeva, 1940 †
- Genus Ungeria Salfeld, 1908 †
- Genus Vachramelia L.B. Golovneva & V.A. Krassilov, 2001 †
- Genus Waldenburgia W. Gothan, 1950 †
- Genus Winchellina H. Herzer, 1893 †
- Genus Woodwardites H.R. Göppert, 1836 †
- Genus Zalesskyella E.F. Tschirkova ex M.D. Zalessky, 1939 †
- Genus Zonopteris Debey & Ettingshausen, 1859 †
- Family Skaaripteridaceae J. Galtier & T.N. Taylor, 1994 †
- Order Pteridales
- Order Salviniales
- Order Schizaeales
- Genus Discosoropteris J. Pšenička et al., 2022 †
- Genus Furcillopteris I.M. Miller & L.J. Hickey, 2008 †
- Genus Gagariostrobus N.K. Mogutcheva in S.P. Bulynnikova & I.G. Klimova, 1987 †
- Genus Gleichenites A.C. Seward, 1927 † accepted as Korallipteris E.I. Vera & M.G. Passalia, 2012 †
- Genus Korallipteris E.I. Vera & M.G. Passalia, 2012 †
- Genus Mikasapteris H. Nishida, R.A. Stockey, Y. Takebe, J. Legrand & T. Yamada, 2022 †
- Genus Polypodites H.R. Göppert, 1836 †
- Genus Sectilopteris I.M. Miller & L.J. Hickey, 2008 †
- Genus Adelocladoxis T. Durieux, M.A. Lopez, A.W. Bronson & A.M.F. Tomescu, 2021 †
- Genus Anthracochondrus Kusta, 1898 †
- Genus Berendtiopteris E.-M. Sadowski, L.J. Seyfullah & A.R. Schmidt in Sadowski et al., 2019 †
- Genus Bifariusotheca X.H. Zhao ex A.B. Doweld, 2019 †
- Genus Eusphenopteris R. Kidston, 1882 †
- Genus Kamatheca A.B. Doweld, 2019 †
- Genus Paracladoxylon Chu & Tomescu, 2024 †
- Class Protoleptosporangiopsida † accepted as Polypodiopsida
- Class Psilotopsida accepted as Polypodiopsida
- Subdivision Spermatophytina
- Class Progymnospermopsida †
- Class Pteridophyta/Pteridospermophyta (unclassified foliage) †
- Class Rhyniopsida †
- Class Trimerophytopsida †
- Class Zosterophyllopsida †
- Order Stenokoleales †
- Genus Ahnetia A.-L. Decombeix & J. Galtier, 2017 †
- Genus Aysenoxylon R.R. Pujana, J.E. Bostelmann, R.A. Ugalde, M.P. Riquelme & T. Torres, 2023 †
- Genus Dameria A.-L. Decombeix, B. Meyer-Berthaud, J. Galtier, J.A. Talent & R. Mawson, 2011 †
- Genus Dibracophyton S.-G. Hao, J.-Z. Xue, X. Zhu & D.-M. Wang, 2012 †
- Genus Douaphyton H.-H. Xu, Y. Wang, P. Tang & Y. Wang, 2017 †
- Genus Endogenites A.T. Brongniart, 1822 †
- Genus Flabellopteris R.W. Gess & C. Prestianni, 2021 †
- Genus Franhueberia L.A. Hoffman & A.M.F. Tomescu, 2013 †
- Genus Jowingera M.A. Bickner & A.M.F. Tomescu, 2019 †
- Genus Kenrickia S. Toledo & A.M.F. Tomescu in Toledo et al., 2021 †
- Genus Leptocentroxyla M.A. Bickner & A.M.F. Tomescu, 2019 †
- Genus Macrotaeniopteris W.P. Schimper, 1869 †
- Genus Mosacaulis R.W.J.M. van der Ham & J.H.A. van Konijnenburg-van Cittert in van der Ham et al., 2011 †
- Genus Nebuloxyla M.A.K. Lalica & A.M.F. Tomescu, 2023 †
- Genus Ninsaria A.-L. Decombeix, J. Galtier, S. McLoughlin & B. Meyer-Berthaud in Decombeix et al., 2019 †
- Genus Oleandridium W.P. Schimper, 1869 †
- Genus Perplexa K.C. Pfeiler & A.M.F. Tomescu, 2023 †
- Genus Petrosjania S.M. Snigirevsky & A.P. Lyubarova, 2023 †
- Genus Planatophyton P. Gerrienne, B. Meyer-Berthaud, N. Yang, P. Steemans & C.-S. Li, 2014 †
- Genus Poacites Schlotheim ex Ballenstedt, 1822 †
- Genus Sporangites J.W. Dawson, 1863 †
- Genus Stenoloboxyla M.A. Bickner & A.M.F. Tomescu, 2019 †
- Genus Taeniopteris A.T. Brongniart, 1828 †
- Genus Tainioxyla M.A. Bickner & A.M.F. Tomescu, 2019 †
- Genus Thursophyton A.G. Nathorst, 1914-1915 †
- Genus Thursophyton A.G. Nathorst ex E.A.N. Arber, 1921 † accepted as Thursophyton A.G. Nathorst, 1914-1915 †
- Genus Tichavekia J. Pšenička, J. Sakala & P. Kraft in Kraft et al., 2019 †
- Genus Tregiovia G. Forte & E. Kustatscher, 2023 †
- Genus Wilhowia P.G. Gensel, 2022 †
- Genus Xadzigacalix A.A. Klymiuk, G.W. Rothwell & R.A. Stockey, 2022 †
- Genus Xinhangia J.-N. Yang & D.-M. Wang, 2022 †
- Genus Yabeiella S. Ôishi, 1931 †
- Phylum Vendophyta † accepted as Algae incertae sedis
- Class Nematophyceae † accepted as Nematophyta †
- Kingdom Protista accepted as Protozoa
- Kingdom Protozoa
- Kingdom Viruses
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